Statistical determination of significant curved I-girder bridge seismic response parameters

查看全文 作　　者：Junwon [1]Seo

机构地区：[1]Department of Civil,Construction & Environmental Engineering,Iowa State University

出　　处：《Earthquake Engineering and Engineering Vibration》索引2013年第12卷第2期,共10页

基　　金：the Korea Electric Power Infrastructure for funding this work 摘　　要：Curved steel bridges are commonly used at interchanges in transportation networks and more of these structures continue to be designed and built in the United States. Though the use of these bridges continues to increase in locations that experience high seismicity, the effects of curvature and other parameters on their seismic behaviors have been neglected in current risk assessment tools. These tools can evaluate the seismic vulnerability of a transportation network using fragility curves. One critical component of fragility curve development for curved steel bridges is the completion of sensitivity analyses that help identify influential parameters related to their seismic response. In this study, an accessible inventory of existing curved steel girder bridges located primarily in the Mid-Atlantic United States (MAUS) was used to establish statistical characteristics used as inputs for a seismic sensitivity study. Critical seismic response quantities were captured using 3D nonlinear finite element models. Influential parameters from these quantities were identified using statistical tools that incorporate experimental Plackett-Burman Design (PBD), which included Pareto optimal plots and prediction profiler techniques. The findings revealed that the potential variation in the influential parameters included number of spans, radius of curvature, maximum span length, girder spacing, and cross-frame spacing. These parameters showed varying levels of influence on the critical bridge response. 关键词：临界地震响应钢箱梁桥参数测定钢结构桥梁交通运输网络计重评估工具实验设计

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Statistical determination of significant curved I-girder bridge seismic response parameters

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